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Lubricating oil compositions

A technology for lubricating oil composition and lubricating base oil, applied in lubricating composition, petroleum industry, base material, etc., can solve problems such as catalyst poisoning, difficulty in lubricating oil, reduction in ash content, etc.

Inactive Publication Date: 2005-10-19
NIPPON OIL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is difficult to use sulfur-free phosphorus compounds to reduce the phosphorus content of lubricating oils, because when the phosphorus content is simply reduced, the extreme pressure performance and anti-wear performance deteriorate accordingly
Alternatively, the use of sulfur-containing compounds will increase the sulfur content of lubricating oil, which will have a detrimental effect on exhaust gas aftertreatment devices, i.e., cannot solve exhaust gas purification catalysts such as three-way catalysts, oxidation catalysts and NOx absorbents and DPF or exhaust gas treatment systems ( Namely, the combination of DPF and exhaust gas purification catalyst), especially the problem of catalyst poisoning of oxidation catalyst or NOx absorber and / or clogging of DPF due to increased sulfur
In addition, the oxidation performance, base number retention performance and detergency of the lubricating oil will be extremely deteriorated
[0010] Therefore, it has been difficult to prepare lubricating oils that can achieve reductions in phosphorus and sulfur or otherwise ash content while maintaining good long-change performance and good wear resistance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-3， and comparative Embodiment 1

[0169] The lubricating oil composition of the present invention (Examples 1-3) and the lubricating oil composition for comparison (Comparative Example 1) were prepared according to the formula shown in Table 1.

[0170] The following performance evaluation tests were carried out for each of the obtained compositions. The results are shown in Table 1.

[0171] (1) Evaluation of high temperature detergency by heat pipe test

[0172] The heat pipe test was performed according to JPI-5S-5599. Each composition is rated from 10 to 0. A grade of 10 is colorless and transparent (no precipitation), and a grade of 0 is black and opaque. Between 10 and 0, the evaluation is performed using a reference tube made according to the previous grade.

[0173] At 290°C, a rating of 6 or above indicates that the composition is considered a lubricating oil with excellent detergency for regular gasoline or diesel engines. However, lubricating oils for gas engines, which in this test show excell...

Embodiment 4 and 5

[0182] Examples 4 and 5, and Reference Examples 1 and 2

[0183] Lubricating oil compositions of the present invention (Examples 4 and 5), and lubricating oil compositions for comparison (Reference Examples 1 and 2) were prepared according to the formulations shown in Table 2 below.

[0184] The following performance evaluation tests were carried out for each of the obtained compositions. The results are shown in Table 2.

[0185] (5) High-speed four-ball test

[0186] According to ASTM D 2783-88, a high-speed four-ball test is carried out on each sample oil. The test conditions are: room temperature, rotation speed 1800rpm, while the load on the four-ball continues to increase. The load (LNSL, last non-captured load) is determined when the ball wears out. The higher LNSL value indicates that the composition has excellent wear resistance and extreme pressure performance.

[0187] (6) Changes in base value retention over time measured by ISOT

[0188] Each composition was ...

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Abstract

A lubricating oil composition is disclosed which comprises a lubricating base oil, (A) at least one type of compound selected from specific phosphoric acid esters and salts thereof or in combination with (B) at least one type of compound selected from specific metal salts of specific phosphoric acid esters, with excellent oxidation stability, base number retention properties, anti-wear properties, extreme pressure properties and anti-corrosion properties and thus can be suitably used, in particular, as a lubricating oil for an internal combustion engine.

Description

technical field [0001] The present invention relates to a lubricating oil composition with excellent long-term replacement performance and wear resistance, more particularly to a low-phosphorus and low-sulfur lubricating oil composition suitable for internal combustion engines. Background technique [0002] Lubricating oils have been used in internal combustion engines and automatic transmissions in order to make them work smoothly. In particular, lubricating oils (engine oils) for internal combustion engines are required to have high characteristic properties due to improvement in performance, increase in output power, and use under severer operating conditions of recently developed engines, and, from From the perspective of recent environmental problems, it is required to further improve the long-term change performance so that the oil change interval can be extended. Therefore, in order to meet these requirements, general-purpose engine oils are mixed with various additi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M101/00C10M137/00C10M137/12C10M141/10C10M163/00C10M167/00C10M169/04
CPCC10M169/045C10M2215/28C10M137/12C10M2223/042C10N2230/42C10M2207/262C10N2230/12C10M141/10C10N2210/02C10N2230/43C10N2230/06C10M2205/028C10M2209/084C10M2223/06C10N2230/10C10M2207/026C10M167/00C10M163/00C10M2223/063C10M137/00C10M2223/061C10M2203/1006C10M169/048C10M2215/064C10M101/00C10M2207/289C10N2240/10C10N2010/04C10N2030/06C10N2030/10C10N2030/12C10N2040/25C10N2030/42C10N2030/43
Inventor 八木下和宏
Owner NIPPON OIL CO LTD
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